Motion & Forces Review

What is the difference between average speed and constant speed?

• A) Average speed is the total distance divided by total time, while constant speed means the speed does not change.

• B) Average speed is the speed at a specific moment, while constant speed varies.

• C) Average speed is always higher than constant speed.

• D) Average speed is the speed of the fastest object, while constant speed is the slowest.

A golf cart travels at a constant speed of 0.10 km/min. It is driven for two hours. What is the total distance traveled?

• A) 12 km

• B) 10 km

• C) 15 km

• D) 20 km

What formula is used to calculate momentum?

• A) Momentum = mass × velocity

• B) Momentum = mass + velocity

• C) Momentum = mass ÷ velocity

• D) Momentum = mass - velocity

What does the Law of Conservation of Momentum state?

• A) The total momentum of a closed system is constant if no external forces act on it.

• B) Momentum can be created or destroyed in a closed system.

• C) Momentum is always increasing in a closed system.

• D) Momentum is irrelevant in a closed system.

An astronaut on the moon would have the same ___ as on Earth.

• mass

• speed

• weight

• acceleration

Highways have speed limit signs rather than velocity limits because:

• Speed is a scalar quantity and easier to measure.

• Velocity includes direction, which is unnecessary for driving.

• Speed limits are based on average car performance.

• Velocity limits would require constant direction changes.

State Newton’s First Law of Motion.

• An object in motion stays in motion unless acted upon by an external force.

• Force equals mass times acceleration.

• For every action, there is an equal and opposite reaction.

• Energy cannot be created or destroyed.

State Newton’s Second Law of Motion.

• An object at rest stays at rest unless acted upon by an external force.

• Force equals mass times acceleration.

• For every action, there is an equal and opposite reaction.

• The total energy of an isolated system remains constant.

State Newton’s Third Law of Motion.

• An object in motion stays in motion unless acted upon by an external force.

• Force equals mass times acceleration.

• For every action, there is an equal and opposite reaction.

• Energy cannot be created or destroyed.

The combined force on an object is called the ____ force.

• Net

• Gravitational

• Frictional

• Magnetic